the seat belt around the shaft. Simply put

belt strap tensioners and force limiters, and intelligent electronic control system. Its role in the process is: the first by a probe is responsible for collecting crash information, and then release the electrical pulse, the pulse is transmitted to the gas generator, detonating gas. Explosion rapid expansion of the gas within the duct, the pressure to the so-called ball chain, so that the ball forward channeling within the tube, driving the ratchet disc revolutions. Detent plate with uranium as a single entity, the seat belt around the shaft. Simply put, the gas pressure to make the ball move, the ball driven pawl plate turn the detent plate to drive shaft turn - instantly realized the function of the seat belt pretensioners.car seat belts